dwc_network_server_emulator/gamespy_gamestats_server.py
Sepalani badcbdf9b4 Gamestats: Handles data with nul bytes in getpdr
Query: Accepts tuple w/ a single element as raw data
2016-07-16 19:15:34 +04:00

422 lines
14 KiB
Python

"""DWC Network Server Emulator
Copyright (C) 2014 polaris-
Copyright (C) 2014 ToadKing
Copyright (C) 2014 AdmiralCurtiss
Copyright (C) 2014 msoucy
Copyright (C) 2015 Sepalani
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
import logging
import time
import traceback
from twisted.internet.protocol import Factory
from twisted.internet.endpoints import serverFromString
from twisted.protocols.basic import LineReceiver
from twisted.internet import reactor
from twisted.internet.error import ReactorAlreadyRunning
import gamespy.gs_database as gs_database
import gamespy.gs_query as gs_query
import gamespy.gs_utility as gs_utils
import other.utils as utils
import dwc_config
logger = dwc_config.get_logger('GameSpyGamestatsServer')
address = dwc_config.get_ip_port('GameSpyGamestatsServer')
class GameSpyGamestatsServer(object):
def __init__(self):
pass
def start(self):
endpoint_search = serverFromString(
reactor,
"tcp:%d:interface=%s" % (address[1], address[0])
)
conn_search = endpoint_search.listen(GamestatsFactory())
try:
if not reactor.running:
reactor.run(installSignalHandlers=0)
except ReactorAlreadyRunning:
pass
class GamestatsFactory(Factory):
def __init__(self):
logger.log(logging.INFO,
"Now listening for connections on %s:%d...",
address[0], address[1])
self.sessions = {}
def buildProtocol(self, address):
return Gamestats(self.sessions, address)
class Gamestats(LineReceiver):
def __init__(self, sessions, address):
self.setRawMode() # We're dealing with binary data so set to raw mode
self.db = gs_database.GamespyDatabase()
self.sessions = sessions
self.address = address
# Stores any unparsable/incomplete commands until the next
# rawDataReceived
self.remaining_message = ""
self.session = ""
self.gameid = ""
self.lid = "0"
self.data = ""
def log(self, level, msg, *args, **kwargs):
if not self.session:
if not self.gameid:
logger.log(level, "[%s:%d] " + msg,
self.address.host, self.address.port,
*args, **kwargs)
else:
logger.log(level, "[%s:%d | %s] " + msg,
self.address.host, self.address.port, self.gameid,
*args, **kwargs)
else:
if not self.gameid:
logger.log(level, "[%s:%d | %s] " + msg,
self.address.host, self.address.port, self.session,
*args, **kwargs)
else:
logger.log(level, "[%s:%d | %s | %s] " + msg,
self.address.host, self.address.port, self.session,
self.gameid, *args, **kwargs)
def connectionMade(self):
try:
self.log(logging.INFO,
"Received connection from %s:%d",
self.address.host, self.address.port)
# Generate a random challenge string
self.challenge = utils.generate_random_str(
10, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
)
# The first command sent to the client is always a login challenge
# containing the server challenge key.
msg = gs_query.create_gamespy_message([
('__cmd__', "lc"),
('__cmd_val__', "1"),
('challenge', self.challenge),
('id', "1"),
])
self.log(logging.DEBUG, "SENDING: '%s'...", msg)
msg = self.crypt(msg)
self.transport.write(bytes(msg))
except:
self.log(logging.ERROR,
"Unknown exception: %s",
traceback.format_exc())
def connectionLost(self, reason):
return
def rawDataReceived(self, data):
try:
# Decrypt packet
self.remaining_message += data
if "\\final\\" not in data:
return
msg = str(self.crypt(self.remaining_message))
self.data = msg
self.remaining_message = ""
commands, self.remaining_message = \
gs_query.parse_gamespy_message(msg)
logger.log(logging.DEBUG, "STATS RESPONSE: %s", msg)
cmds = {
"auth": self.perform_auth,
"authp": self.perform_authp,
"ka": self.perform_ka,
"setpd": self.perform_setpd,
"getpd": self.perform_getpd,
"newgame": self.perform_newgame,
"updgame": self.perform_updgame,
}
def cmd_err(data_parsed):
logger.log(logging.DEBUG,
"Found unknown command, don't know how to"
" handle '%s'.", data_parsed['__cmd__'])
for data_parsed in commands:
print(data_parsed)
cmds.get(data_parsed['__cmd__'], cmd_err)(data_parsed)
except:
self.log(logging.ERROR,
"Unknown exception: %s",
traceback.format_exc())
def perform_auth(self, data_parsed):
self.log(logging.DEBUG, "%s", "Parsing 'auth'...")
if "gamename" in data_parsed:
self.gameid = data_parsed['gamename']
self.session = utils.generate_random_number_str(10)
msg = gs_query.create_gamespy_message([
('__cmd__', "lc"),
('__cmd_val__', "2"),
('sesskey', self.session),
('proof', 0),
('id', "1"),
])
self.log(logging.DEBUG, "SENDING: '%s'...", msg)
msg = self.crypt(msg)
self.transport.write(bytes(msg))
def perform_authp(self, data_parsed):
authtoken_parsed = gs_utils.parse_authtoken(data_parsed['authtoken'],
self.db)
# print authtoken_parsed
if "lid" in data_parsed:
self.lid = data_parsed['lid']
userid, profileid, gsbrcd, uniquenick = \
gs_utils.login_profile_via_parsed_authtoken(authtoken_parsed,
self.db)
if profileid is not None:
# Successfully logged in or created account, continue
# creating session.
sesskey = self.db.create_session(profileid, '')
self.sessions[profileid] = self
self.profileid = int(profileid)
msg = gs_query.create_gamespy_message([
('__cmd__', "pauthr"),
('__cmd_val__', profileid),
('lid', self.lid),
])
else:
# login failed
self.log(logging.WARNING, "Invalid password")
msg = gs_query.create_gamespy_message([
('__cmd__', "pauthr"),
('__cmd_val__', -3),
('lid', self.lid),
('errmsg', 'Invalid Validation'),
])
self.log(logging.DEBUG, "SENDING: '%s'...", msg)
msg = self.crypt(msg)
self.transport.write(bytes(msg))
def perform_ka(self, data_parsed):
msg = gs_query.create_gamespy_message([
('__cmd__', "ka"),
('__cmd_val__', ""),
])
self.log(logging.DEBUG, "SENDING: '%s'...", msg)
msg = self.crypt(msg)
self.transport.write(bytes(msg))
return
def perform_setpd(self, data_parsed):
data = self.data
msg = gs_query.create_gamespy_message([
('__cmd__', "setpdr"),
('__cmd_val__', 1),
('lid', self.lid),
('pid', self.profileid),
('mod', int(time.time())),
])
self.log(logging.DEBUG, "SENDING: '%s'...", msg)
msg = self.crypt(msg)
self.transport.write(bytes(msg))
# TODO: Return error message.
if int(data_parsed['pid']) != self.profileid:
logger.log(logging.WARNING,
"ERROR: %d tried to update %d's profile",
int(data_parsed['pid']), self.profileid)
return
data_str = "\\data\\"
length = int(data_parsed['length'])
if len(data) < length:
# The packet isn't complete yet, keep loop until we get the
# entire packet. The length entire packet SHOULD always be
# greater than the data field, so this check should be fine.
return
if data_str in data:
idx = data.index(data_str) + len(data_str)
data = data[idx:idx + length].rstrip("\\")
else:
logger.log(logging.ERROR,
"ERROR: Could not find \data\ in setpd command: %s",
data)
data = ""
current_data = self.db.pd_get(self.profileid,
data_parsed['dindex'],
data_parsed['ptype'])
if current_data and data and 'data' in current_data:
current_data = current_data['data'].lstrip('\\').split('\\')
new_data = data.lstrip('\\').split('\\')
current_data = dict(zip(current_data[0::2],
current_data[1::2]))
new_data = dict(zip(new_data[0::2], new_data[1::2]))
for k in new_data.keys():
current_data[k] = new_data[k]
# TODO: use str.join()
data = "\\"
for k in current_data.keys():
data += k + "\\" + current_data[k] + "\\"
data = data.rstrip("\\") # Don't put trailing \ into db
self.db.pd_insert(self.profileid,
data_parsed['dindex'],
data_parsed['ptype'],
data)
def perform_getpd(self, data_parsed):
pid = int(data_parsed['pid'])
profile = self.db.pd_get(pid,
data_parsed['dindex'],
data_parsed['ptype'])
if profile is None:
self.log(logging.WARNING,
"Could not find profile for %d %s %s",
pid, data_parsed['dindex'], data_parsed['ptype'])
keys = data_parsed['keys'].split('\x01')
profile_data = None
data = ""
# Someone figure out if this is actually a good way to handle this
# when no profile is found
if profile is not None and 'data' in profile:
profile_data = profile['data']
if profile_data.endswith("\\"):
profile_data = profile_data[:-1]
profile_data = \
gs_query.parse_gamespy_message("\\prof\\" + profile_data +
"\\final\\")
if profile_data is not None:
profile_data = profile_data[0][0]
else:
self.log(logging.WARNING,
"Could not get data section from profile for %d",
pid)
if len(keys):
# TODO: more clean/pythonic way to do (join?)
for key in keys:
if key in ("__cmd__", "__cmd_val__", ""):
continue
data += "\\" + key + "\\"
if profile_data is not None and key in profile_data:
data += profile_data[key]
else:
self.log(logging.WARNING,
"No keys requested, defaulting to all keys: %s",
profile['data'])
data = profile['data']
modified = int(time.time())
# Check if there is a nul byte and data after it
data_blocks = data.split('\x00')
if len(data_blocks) > 1 and any(block for block in data_blocks[1:]):
self.log(logging.WARNING, "Data after nul byte: %s", data)
data = data_blocks[0]
msg = gs_query.create_gamespy_message([
('__cmd__', "getpdr"),
('__cmd_val__', 1),
('lid', self.lid),
('pid', pid),
('mod', modified),
('length', len(data)),
('data', ''),
(data,)
])
if msg.count('\\') % 2:
# An empty field must be terminated by \ before \final\
msg = msg.replace("\\final\\", "\\\\final\\")
self.log(logging.DEBUG, "SENDING: '%s'...", msg)
msg = self.crypt(msg)
self.transport.write(bytes(msg))
def perform_newgame(self, data_parsed):
# No op
return
def perform_updgame(self, data_parsed):
# No op
return
def crypt(self, data):
key = bytearray(b"GameSpy3D")
key_len = len(key)
output = bytearray(data.encode("ascii"))
if "\\final\\" in output:
end = output.index("\\final\\")
else:
end = len(output)
for i in range(end):
output[i] ^= key[i % key_len]
return output
if __name__ == "__main__":
gsss = GameSpyGamestatsServer()
gsss.start()